Interlayer oxidized zone and argillite-sisandstone-argillite sequence occur in red clastic rock formation with ideal artesian and circulating system of ground water.
A spokesperson for the French company Areva said a team was going to assess the damage of the uranium sites of Arlit, but production has stopped for now.
The assault comes just over a week after simultaneous suicide attacks to the military barracks and the French-administered uranium mine in Niger. Mary Harper reports.
In the north, the country's colonial past and the large uranium mines run by French companies have colored some Nigeriens' views about outsiders coming to dig in their deserts.
Large deposits of coal and natural gas, as well as a three percent chunk of the planet's oil reserves and 40 percent of its uranium mean that Kazakhstan's people could be rich.